Combined lock and butt gage.



MATHEW F. IBIERSDORF, OF LOS ANGELES, CALIFORNIA.

COMBINED LOCK AND BUTT GAGE.

Application filed October 18,1917.

To all whom it may concern:

Be it known that I, MATHEW F. BrERsnonr, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State'of California,have invented new and useful Improvements in Combined Lock and Butt Gages, of which the following is a specification.

This invention relates to a gage and particularly pertains to a combined lock and butt gage.

It is the principal object of this invention to provide a gage having scoring points which may be adjustably set in relation to each other and thereafter adjustably set in relation to working faces, thus permitting a mortise to be laid out along the edge of a door to receive a lock and a mortise for a strike plate to be laid out along the jamb without re-setting the points.

Another object of this invention is to provide a gage within which ordinary gage points are incorporated as well as sets of points which may be simultaneously adjusted in relation to each other and their working faces and which will produce score marks irrespective of the angle at which the block of the tool is disposed:

Other objects will appear hereinafter.

The invention is illustrated by way of example, in the accompanying drawings in which:

Figure 1 is a view in perspective illustrating the completely assembled gage.

Fig. 2'is a view in plan showing in section and elevation the gage block and the scribing bars slidably mounted therein.

Fig. 3 is a view seen through the gage on the line 33 of Fig. 2 disclosing the manner in which the scribing bars are locked in relation to each other and the block.

Fig. i is a view in perspective illustrating the scribing bar used for ordinary gage work. i

Figs. 5 and 6 are views in perspective of the complementary scribing bars used for laying out lock and strike plate mortises on the jamb and door.

Referring more particularly to the drawings, 10 indicates a gage block which is rectangular in shape and is here shown as formed from a single piece of sheet metal bent to form parallel sides, edges, and an Specification of Letters Patent.

' in scribing mortises.

further noted that the in transverse section as.

Fatented Oct. 22, 1912.

Serial No. 197,323.

end wall, within which a scribing bar 11 for butts and for ordinary work is positioned, and a pair of complementary scribing bars 12 and 13 is positioned for use particularly The edge walls 14 and 15 of the block are formed with central longitudinal slots 16 and 17. Through the slot 16 an adjusting screw 18 is positioned and is fitted with an enlarged knurled head 19 which bears against the outer face of the edge wall. The screw extends through a spacing collar 20 and into a threaded opening in the single scribing bar 11 Due to this arrangement this bar may be slidably positioned in relation to the end wall 21 of the block and a removable face plate 22 disposed over the opposite opened end of the block. This face plate is formed with an opening 23 in the shape of a key-hole through which the scribing bar 11 may slide and into which the short scribing point 24: may seat. This point is secured to the end of the bar 11 and extends at right angles thereto, while another point 25 is similarly secured to the opposite end of the bar and extends at right angles to the bar and in a diametrically opposite direction from the point 2 1. This last-named point passes through a slotted opening 26 in the lower side 27 of the block and stands at right angles thereto. The length of the single scribing bar 11 is slightly shorter than that of the block 10, its scribing points being flush with the face of the plate 22 and the inner face of the end wall 21 when the bar is in its inoperative position. It is to be single bar 11, is mounted parallel to and adjacent the edge wall 15 of the block andthat it is provided with graduations which register with the face plate and indicate the distance at which the scoring points are set from the end 21 of the block and the face of the plate.

Mounted through an opening 28 in the face plate 22 and substantially mid-way between the side plate 27 of the block and the side plate 29 are the complementary scribing bars 12 and 13. These bars extend parallel to the edge wall 1 1 and adjacent thereto. As particularly shown in Fig, 3 the bars 12 and 13 have flat faces which bear against each other and act to steady the two bars while they are separately moved. These faces extend parallel to the side walls of the face plate 22, while the points 38 plate 35 secured block. The scribing block. The bars are adjustably held within a yoke 30 which is formed with a flat face adapted to bear against the inner face of the edge wall 14 against which it may be clamped by a knurling clamping nut 31 which is mounted upon a set-screw 32. This screw extends through the slot 17 in the edge wall and thereafter passes through a nut 33 positioned between the arms of the yoke, the end bearing upon a clamping plate 34. This plate is movably held between the arms of the yoke and against side faces of the two scribing bars 12 and 13. The opposite side faces of the bars bear upon a fixed clamping rigidly at the ends of the yoke arms. The bars 12 and 13 are formed at their opposite ends with scribing points 36 and 37, and 38 and 39. The points 36 and 37 are secured to the adjacent ends of the bars and may be moved in relation to the and 39 are secured upon the opposite ends of the bars and extend upwardly through a slotted opening 10 in the side wall 29 of the block. It is to be noted that the two sets of points bear the same relation to each other although the points 36 and 37 extend oppositely from the points 38 and 39. The points of each set are so designed as to fall within a common plane in relation to each other, at right angles to their working faces, and longitudinally of the bars.

In operation, when the mortises for locks are to be laid out upon the edges of doors and mortises for strike plates upon the jambs thereof, the scribing bars 12 and 13 are unclamped from each other by the setscrew 32, the pressure of which is released from the plate 34, after which the lock-nut 31 is moved from a clamping position against the edge wall 14 of the block. The scribing bars 12 and 13 will then be free to move in relation to each other and the points 36 and 37 are then set in a desired spaced relation to each other, after which they are locked by tightening the set-screw 32 to clamp the bars 12 and 13 between the movable and fixed clamping plates 34 and 35. The point 36 is then set in a desired position in relation to' the face of the plate 22, after which the lock nut 31 is tightened against the side of the block to simultaneously lock the two bars 12 and 13 in fixed relation to the face plate 22 while they are maintained in a predetermined relation to each other. The face of the plate 22 may then be brought to bear against the side of a door therealong will cause the scribing points 36 and 37 to make parallel scoring marks along the edge of the door. It will be noted that when the points 36 and 37 were set the points 38 and 39 were also set the same distance from each other, and a predetermined distance from the end Wall 21 of the block.

and as it is drawn The distance from the scribing point 36 to the face is approximately a thirty-second of an inch less than th distance from the scribing point 38 to the face of the end wall 21, the exact difference being the gage of the metal of which the end wall is formed. Thus, when the jaInb is scribed with the end wall 21 against the shoulder formed along the jamb, the points 38 and 39 will make score marks for the mortise of a strike plate which will allow the required clearance between the face of the door and'the rabbet of th jamb. It will be noted that due to the fact that the points comprising the sets at the opposite ends of the bars 12 and 13 are in alinement with each other both longitudinally and upon a plane at right angles to the 'ace of the block, the block may be tilted Without causing either of the points to be raised from the surface being marked. The scribing bar 11 may be set in a manner which is evident and when set will hold its scribing point in substantially equal spaced relation to theface plate and the inner end wall of the block 10, allowing proper clearance between the door and the rabbet of the jamb. It will further be noted that as the point 24 upon the bar 11 extends in an opposite direction from the points 36 and 37, these three points may be used in connection with each other or interference.

In case the removal of the scribing bars is required or other repairs necessary, the face plate 22 may be removed by unscrewing the screws 41 and 42, thus allowing ready access to the interior of the block.

It will thus be seen that the device here disclosed, while simple in its construction and the design of its parts, provides an easily adjusted scribing gage adapted to perform several functions at one setting and to be easily manipulated during operation.

While I have shown the preferred construction of my combined lockand butt gage as now known to me, it will be understood that various changes in the combination, construction, and arrangement of parts may be made by those skilled in the art without departing from the spirit of my invention as claimed. i

I claim:

A combined lock and butt gage comprising a hollow rectangular block having a central longitudinal slot through one edge wall and a longitudinal slot through one side wall, a face plate secured to one end of the block and having an opening in longitudinal alinement with the slot in the side Wall, a yoke fitting against the inner face of theslotted edgewall, a screw inserted through the slot, through the yoke, and through a nut, a clamping plate in the yoke against the inner end of the screw, a nut upon the screw against the outer face of the slotted separately, without edge Wall, a head the nut, a pair mounted in the other and adapted to be clamped the clamping plate;

position by upon the screw outside of of scribing bars slidingiy yoke and sliding upon each in adjusted said bars extending through the opening in the face plate; scribing Copies of this patentmay be obtained for points extending downfive cents each, by addressing the Washington, D. G.

name to this specification.

MATHEWV F. BIERSDORF.

Commissioner of Yatents, 

